Projection type display apparatus

Abstract

A projection type display apparatus that projects video onto a screen includes a liquid crystal panel using polymer-dispersed liquid crystal that disperses light when a voltage is applied and that transmits light when a voltage is not applied, being attached to an apparatus body 2 as a screen 1; and the video output from the apparatus body 2 is projected onto the screen 1 from the front side. Accordingly, there is provided the projection type display apparatus suitable for use in small space such as at home, in which a place for setting the apparatus is flexibly selected and the feeling of oppression is mitigated when the apparatus is not used.

Description

TECHNICAL FIELD [0001] The present invention relates to a projection type display apparatus, particularly, to the apparatus suitable for use in comparatively small space such as at home. BACKGROUND ART [0002] A projection type display apparatus such as a liquid crystal projector or the like has been widely used as a video display apparatus having a large-sized screen. [0003] There have been known conventional projection type display apparatuses, one of which is classified as a front type (front projection type) in which from the front surface video is projected onto a reflective type screen provided separately from a projection type display apparatus, and the other of which is a rear type (rear projection type) in which from the rear surface video is projected onto a transmissive type screen integrally provided with a projection type display apparatus. [0004] Conventionally, when a front projection type display apparatus is set at home, in general, a reflective screen is attached on...

AI Technical Summary

Benefits of technology

[0011] This projection type display apparatus is a front projection type display apparatus in which video is projected onto a screen attached to an apparatus body (the apparatus itself and the screen are integrally provided) Therefore, it is not necessary to attach a screen on a wall or the like at home, contrary to a conventional front projection type display apparatus. Also, it is not necessary to contain the light pass. from the projection lens to a screen in a housing, contrary to a conventional rear projection type display apparatus, so that the apparatus can be small-sized. Accordingly, even if the apparatus is set in comparatively narrow space such as at home, a place for setting the apparatus can be more freely selected.

[0013] Further, a liquid crystal panel constituting the screen employs polymer-dispersed liquid crystal that disperses light when a voltage is applied, and that transmits light when a voltage is not applied. Therefore, when video is not projected, the screen can be transparent without applying a voltage, so that a consumption of a standby power can be reduced when not used.

[0018] In this projection type display apparatus, since a screen becomes transparent when not used, a user's awareness of the screen becomes lower. Then, by making a screen elliptical in shape, the safety can be enhanced when not used (even if a user touches a screen without notice, a user can not be injured because of no-corners therein).

[0024] This projection type display apparatus is a front projection type display apparatus in which video is projected onto a screen attached to a body of an apparatus from the front (namely, a body of apparatus and a screen are integrally provided). Thus, it is not necessary to attach a screen on a wall or the like at home, contrary to a conventional front projection type display apparatus. Further, it is not necessary to contain the part of optical pass from a projection lens to a screen in the housing contrary to a conventional rear projection type display apparatus, so that the apparatus can be small-sized. With this, a place for setting the apparatus can be selected more freely, even if it is set in a comparatively narrow space such as at home.

[0029] In this projection type display apparatus, since a screen becomes transparent when not used, a user's awareness of a screen becomes lower. Then, by making a screen elliptical in shape, the safety can be enhanced when not used (even if a user touches a screen without notice, a user can not be injured, because of no-corners therein).

[0035] Accordingly, when video is not projected, the screen becomes transparent without applying a voltage, a consumption of the stand-by power can be reduced when the apparatus is not used.

Problems solved by technology

Thus, even if the apparatus is used in comparatively narrow space such as at home, a feeling of uncomfortable oppression shall not be given when the apparatus is not used.

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